#include <stdio.h>
#include <string.h>
#include <unistd.h> 
int main()
{
	 const char *msg0="hello printf\n";
	 const char *msg1="hello fwrite\n";
	 const char *msg2="hello write\n";
	 
	 printf("%s", msg0);
	 fwrite(msg1, strlen(msg0), 1, stdout);
	 write(1, msg2, strlen(msg2));
	 
	 fork();
	 
	 return 0;
}
